Patent GB-143462-A (GB)
Abstract: 143,462. Haddan, A. J. H., (National Cash Register Co.). Feb. 19, 1919. Cash-registers; with operating means; differential mechanism; full-stroke mechanism.-A lateral shift denomination-selecting mechanism for single-bank, key-set, independently-operated cashregisters comprises a set of item wheels normally out of engagement with but, by means of the keys, positively shifted by a two-part step-bystep movement into engagement with a quadrant or other master actuator, and into engagement with a set of segment wheels by means of which the type wheels are differentially positioned, and the totalizer actuated as the item wheels are reset. The keys 40 pivoted on a shaft 29 are so slotted that when operated they move an actuator 50 differentially according to the key depressed. Through the medium of other slots in the key levers a shaft 59 is rocked, and an arm 84 carrying at its end a flange 85 with a cam ridge 86 is rocked at each depression of a key, the key and the arm 84 being returned by springs. The item wheels 66 are loosely mounted on, but cannot move axially relatively to, a sleeve 70 which slides on a fixed rod 71 and is moved step by step to the left from the normal position shown in Fig. 4 by means of the cam-ridge 86 which engages the lower teeth on rack 78, as shown in Fig. 7, having teeth on each edge attached at one end to the sleeve 70, the other end being fixed to a member 81 loosely mounted on a sleeve 82 loose on the rod 71. The construction of the cam 86 and the slots in the key-levers is such that on depressing a key, during the first part of its movement the item wheels are moved a half-step to the left, so that the wheel on the extreme left gears with the actuator 50. Further movement of the key causes this wheel to be rotated differentially according to the key-value. The last part of the key-movement causes the item wheels to move another half-step to the left, the extreme left wheel running out of gear with the actuator and into gear with the right-hand member of a series of sectors 130. The rack 78 is lifted so that the cam ridge is free during its return move. ment and that of the key. The item wheels are locked when not in engagement with either the actuator or the sectors 130 by means of a fixed locking plate, the teeth 133 oi which are engaged by the item wheels. When a complete setting has beeu imported to the item wheels, rotation of the main shaft 29 zeroizes these and throws the setting into the sectors 130, which through nested sleeves, sectors 145, wheels 146, and further nested sleeves communicates the setting to type wheels 148. The item wheels are returned to normal position laterally by a cam 111 actuated by the main shaft and engaging a roller 113 carried by the sleeve 70. The amount set up on the item wheels together with the clerk's initial and the character of the transaction is indicated through windows in the framing. The re-setting means for the item wheels comprise sectors 153 carrying a rod which passes through slots on the item wheels, such sectors gearing with sectors 154 which are moved through a link and cam gear from the main shaft 29. The rack 78 is lifted by the following means. The sleeve 82, Fig. 12, on the rod 71 carries a disk 93, an arm 94, and arms 96, 98 which support a rod 97 passing through the member 81. A projection 109 on the part 96 bears on the flange 85 and ensures that when a key is depressed it must be fully depressed, otherwise the projection 109 will bind on the flange and prevent the return of the key. The disk 93 has a projection 99 passing into a slot 100 in the flange 85. In forward movement of the shifting cam 86, the flange 85 rides over a flange 95 on the arm 94. Towards the end of the stroke, the end of the slot 100 engages the projection 99 and rocks the sleeve 82, and through the rod 97 the sleeve 81 and the rack. Near the end of the return stroke, the other end of the slot engages the projection 99 and the bar is lowered to normal. During the return movement of the cam-lever 84, the flange 95 is over the flange 85 and the rack is held. The left-hand side of the flange 85 is cut away to permit the lever 94 to pass to normal. At the beginning of the operation of the main handle the rack must be lifted, and, to accomplish this, an arm 102, Fig. 7, loose on the shaft 59 is moved by a cam on the main shaft so that the shoulder 125 engages the rod 97 to raise the rack, and the shoulder 126 engages the rod 97 to lower the rack. A nose 101 on the arm 102 is engaged by the upper teeth in the rack 78 and serves to aline the rack when lifted.